def __get_aws_metric(table_name, gsi_name, time_frame, metric_name):
""" Returns a metric list from the AWS CloudWatch service, may return
None if no metric exists
:type table_name: str
:param table_name: Name of the DynamoDB table
:type gsi_name: str
:param gsi_name: Name of a GSI on the given DynamoDB table
:type time_frame: int
:param time_frame: How many seconds to look at
:type metric_name str
:param metric_name Name of the metric to retrieve from CloudWatch
:returns: list --
A list of time series data for the given metric, may be None if
there was no data
"""
try:
start_time = datetime.utcnow()-timedelta(minutes=10, seconds=time_frame)
end_time = datetime.utcnow()-timedelta(minutes=10)
return cloudwatch_connection.get_metric_statistics(
period=time_frame,
start_time=start_time,
end_time=end_time,
metric_name=metric_name,
namespace='AWS/DynamoDB',
statistics=['Sum'],
dimensions={
'TableName': table_name,
'GlobalSecondaryIndexName': gsi_name
},
unit='Count')
except BotoServerError:
raise
def __get_aws_metric(table_name, time_frame, metric_name):
""" Returns a metric list from the AWS CloudWatch service, may return
None if no metric exists
:type table_name: str
:param table_name: Name of the DynamoDB table
:type time_frame: int
:param time_frame: How many seconds to look at
:type metric_name str
:param metric_name Name of the metric to retrieve from CloudWatch
:returns: list -- A list of time series data for the given metric, may
be None if there was no data
"""
try:
start_time = datetime.utcnow()-timedelta(minutes=10, seconds=time_frame)
end_time = datetime.utcnow()-timedelta(minutes=10)
return cloudwatch_connection.get_metric_statistics(
period=time_frame,
start_time=start_time,
end_time=end_time,
metric_name=metric_name,
namespace='AWS/DynamoDB',
statistics=['Sum'],
dimensions={'TableName': table_name},
unit='Count')
except BotoServerError as error:
logger.error(
'Unknown boto error. Status: "{0}". '
'Reason: "{1}". Message: {2}'.format(
error.status,
error.reason,
error.message))
raise
def __get_aws_metric(table_name, lookback_window_start, metric_name):
""" Returns a metric list from the AWS CloudWatch service, may return
None if no metric exists
:type table_name: str
:param table_name: Name of the DynamoDB table
:type lookback_window_start: int
:param lookback_window_start: How many minutes to look at
:type metric_name: str
:param metric_name: Name of the metric to retrieve from CloudWatch
:returns: list -- A list of time series data for the given metric, may
be None if there was no data
"""
try:
now = datetime.utcnow()
start_time = now - timedelta(minutes=lookback_window_start)
end_time = now - timedelta(minutes=lookback_window_start - 5)
return cloudwatch_connection.get_metric_statistics(
period=300, # Always look at 5 minutes windows
start_time=start_time,
end_time=end_time,
metric_name=metric_name,
namespace='AWS/DynamoDB',
statistics=['Sum'],
dimensions={'TableName': table_name},
unit='Count')
except BotoServerError as error:
logger.error('Unknown boto error. Status: "{0}". '
'Reason: "{1}". Message: {2}'.format(
error.status, error.reason, error.message))
raise
def __get_aws_metric(table_name, gsi_name, time_frame, metric_name):
""" Returns a metric list from the AWS CloudWatch service, may return
None if no metric exists
:type table_name: str
:param table_name: Name of the DynamoDB table
:type gsi_name: str
:param gsi_name: Name of a GSI on the given DynamoDB table
:type time_frame: int
:param time_frame: How many seconds to look at
:type metric_name str
:param metric_name Name of the metric to retrieve from CloudWatch
:returns: list --
A list of time series data for the given metric, may be None if
there was no data
"""
try:
start_time = datetime.utcnow() - timedelta(minutes=10,
seconds=time_frame)
end_time = datetime.utcnow() - timedelta(minutes=10)
return cloudwatch_connection.get_metric_statistics(
period=time_frame,
start_time=start_time,
end_time=end_time,
metric_name=metric_name,
namespace='AWS/DynamoDB',
statistics=['Sum'],
dimensions={
'TableName': table_name,
'GlobalSecondaryIndexName': gsi_name
},
unit='Count')
except BotoServerError:
raise
def __get_aws_metric(table_name,
gsi_name,
lookback_window_start,
lookback_period,
metric_name):
""" Returns a metric list from the AWS CloudWatch service, may return
None if no metric exists
:type table_name: str
:param table_name: Name of the DynamoDB table
:type gsi_name: str
:param gsi_name: Name of a GSI on the given DynamoDB table
:type lookback_window_start: int
:param lookback_window_start: How many minutes to look at
:type lookback_period: int
:type lookback_period: Length of the lookback period in minutes
:type metric_name: str
:param metric_name: Name of the metric to retrieve from CloudWatch
:returns: list --
A list of time series data for the given metric, may be None if
there was no data
"""
try:
now = datetime.utcnow()
start_time = now - timedelta(minutes=lookback_window_start)
end_time = now - timedelta(
minutes=lookback_window_start - lookback_period)
return cloudwatch_connection.get_metric_statistics(
period=lookback_period * 60,
start_time=start_time,
end_time=end_time,
metric_name=metric_name,
namespace='AWS/DynamoDB',
statistics=['Sum'],
dimensions={
'TableName': table_name,
'GlobalSecondaryIndexName': gsi_name
},
unit='Count')
except BotoServerError as error:
logger.error(
'Unknown boto error. Status: "{0}". '
'Reason: "{1}". Message: {2}'.format(
error.status,
error.reason,
error.message))
raise